table {
    border-collapse: collapse; /* 合并边框，避免双边框 */
    /*width: 100%;*/
}

th, td {
    border: 1px solid #dddddd; /* 单元格边框 */
    padding: 20px 40px;
    text-align: left;
}

tr:nth-child(odd) {
    background-color: pink;
}

tr:nth-child(even) {
    background-color: #9dde9d;
}
